Here's a good way to get an idea...assuming no one really stays in step 1 rates with EV...so it will be based on annual 20k km + step 2 rate of 14 cents.
I've driven about 20000k with an 209w/km average on my SR+ with 18" and 19" rims... doing the math:
209w = .209KW * 20000km = 4180kW * $.14...